The 10 Gbit / s network switch series H3C S6520X-EI was designed for core and aggregation layer high-density applications. The switches provide outstanding capacity with 10 or 40 Gbit / s high-density line-speed ports and 10 Gbit / s port expansion capabilities. The dual-power module and dual-fan solution allow for component exchange during ongoing operation without affecting the functionality of the switches. Fan capacity is automatically adjusted to the temperature, saving energy and reducing noise.